Petcock



E. J. FRASER. PETCOCK.

APPLICATION FlLED FEB.24.1920.

1,8?8,321 a Patented Mar. 29, 1921.

EDWIN J. FRASER, OF CHICAGO, ILLINOIS, ASSIGNOR 0F ONE-HALF TO SAMUEL H. BINGHAM, J'B.., OF CHICAGO, ILLINOIS.

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Specification of Letters Patent.

Patented Mar. 2a, 1921.

Application filed February 24, 1920. Serial No. 360,649.

To all whom it may concern:

Be it known that I EDWIN J. FRASER, a citizen of the United tates of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Petcocks, of which the following is a specification.

The main objects of this invention are t o provide an improved form of priming device for internal combustion engines, which will serve the purpose of the usual priming petcock but will be free from the troubles resulting from leakage and sticking of the valves of pet-cocks.

An illustrative embodiment of this invention is shown in the accompanying drawings, in which-- Figure 1 is a side elevation of the priming device mounted on a cylinder casing, the casin being shown as a fragmentary section. l ig. 2 is a rear elevation of the primer.

Fig. 3 is a vertical section taken on the line 3-3 of Fig. 2.

As shown in the drawings, the priming device comprises a body 1 in the form of a cup and valve controlled neck which is mounted on the cylinder of an engine in the usual T he neck 3 is externally threaded at its lower end 4 for engagement with a threaded aperture 5 in the cylinder head 2. The sides of the body member above the threads 4 have flat faces 6 to which a wrench may be applied. A vertically' elisposed passage 7 extends axially through the body and stem and is slightly flared at its lower end to form a valve seat 8.

The upper end of the body member forms a cup 9 which communicates with the passage 7. A valve stem 10, loosely mounted in the passage 7, carries a ball valve 11 which coacts with the seat 8. v

A bell crank lever 12 pivotally mounted at 13 on a lug 14 which extends outwardly and upwardly from one side of the gage, cup, has one arm pivoted to the upper end of the valve stem by a pin 15 and the other arm of the lever extends downwardly to form a handle 16. The valve is held normally closed by a sprin 17 the free end of which bears against the lower face of the horlzontal arm of the lever. The other end of the spring passes through a slot 18 formed in the lever and is then coiled around the lug 14.

A slot 19 is formed in the lug 14 to receive the end of a pawl 20 which is pivotally connected to the handle of the bell crank lever. When the handle 16 is swung to open the valve outwardly away from the body member, the pawl 20 falls by its own weight into engagement with a shoulder 21 at the outer end of the slot 19 and locks the valve open. An arm 22 on the pawl 20 enables the pawl to be easily disengaged from the shoulder 21.

It is sometimes desirable to operate the valve mechanism from the drivers seat of the vehicle and to that end the handle 16 may be connected by a link 23 to suitable operating mechanism at a distance. In such case the pawl 20 would be removed or the operating mechanism so limited in its movement that the pawl will lock the valve open only when the handle 16 is operated directly by hand.

One of the primers is seated in each of the engine cylinders and when it is vdesired to prime the engine the cups 9 are filled with a light fuel. The valves are then opened to permit the fuel to flow into the cylinders. The device may also be used as a pet-cock for attachment to the side of'a crank case to determine the level of the oil.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that nu merous details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claims.

I claim: 7

1. A device of the class described, comprising a cup having a tubular neck with a valve seat at its lower end, a stem longitudinally shiftable in said neck, a valve carried at the lower end of said stem, means normally seating said valve, and a bell crank lever pivotally mounted on said cup, one arm of said bell crank being directly pivoted to said stem, the other arm of said bell crank forming a handle whereby said lever is adapted to open said valve against the action of said means.

2. A device of the class described, comprising a cup having a tubular neck with a valve seat at its lower end, a stem longitudinally shiftable in said neck, a valve carried at the lower end of said stem, means normally seating said valve, a lug integrally formed on said cup, a lever pivotally mounted on said lug, and connected to said stem, a shoulder formed on said lug, and a pawl pivotally mounted on said crank level and adapted to be shifted into engagement with 10 said shoulder to lock said valve out of en gagement with said seat.

igned at Chicago this 21 day of Feb., 1920.

EDWIN J. FRASER. 

